Radial drilling machine



Aug. l0 1926.' 1,5955962 H. DREsEs RADIAL DRILLING MAGHINE Filed Jan. 1v1. 1923 4 sheets-sheet 1 Fig l 205' Q04/ zo; :0|

H. DRlsEsv RADIAL DRILLING MACHINE Filed Jan. 11. 192s gli/lll Aug. 10

H. DRESES RADI AL DRILLING MACHINE Filed Jan. 1.1. ms 4 sheets-sneu s H. DRESES RADIAL DRILLING 111101111111 Aug. 1o 192e. 1,595,962

Filed Jan. 11. 1923 4 sheets-sheet i Patented Aug. l0, 1926.

UNITED STATE rarsu'r eFFlcE.

HENRY DRESES, OF CINCINNATI, OHIO, ASSIGNOR T THE DRESES MACHINE TOOL COMPANY; OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

RADIAL DBILLING MACHINE.

Application filed January 11,V 1923. Serial No.V 611,945.

In radial. drilling machines the drill-arm is adjustable so as to be located in various radial positions. Such machines usually empl-oy. an upright post, about which there is a rotatable column, the` drill-farm extending radially from the column and being adjustable upand down on the same. rlhe column is rotatable about the post so as to place the arm in its various radial positions. Clamping means are usually employed for clamping the column with relation to the post when the drill-arm has been positioned.

I have exemplilied my invention in connection with a radial drilling machine of this character.

It is the object of my invention to provide new and improved means whereby to clamp the radial drill-arm in selective radial positions; further, to provide clamping means o'l this character in a drilling machine which are operable by a rotatable power element of the machine; further, to provide control means 'for the same com prising a manual actuator at the drill-arm; further; to provide clamping' means in a drilling machine and control means for the clamping means wherein. the control means comprise a cam having a steep angle to aliord ready relief in the operatingmeans for the clamp; further, to provide a clamp operating means and control meansfor the latter so related that the control means yield to undue pressure in the operating means; and, further, to provide clamp operating means in a drilling machine operated by an element in the train ot power mechanism for the spindle.

The invention will be further readily understood from the following description and claims, and from the drawings, in which latter:

Fig. l is a rear elevation of so much of a drilling machine as is necessary to show my improvements thereon.

Fig. 2 is a front elevation of the same, the post and column being shown in section.

Fig. 3 is a plan view of the gearing at the top of the column.

Figli is a vertical cross-section taken on the line 4*@ of Fig. l.

rotating Fig. 5 is a horizontal cross-section taken on the line 5-5 of Fig. 1.v

F 6 is a vertical axial section taken on the line 6 6 of Fig. 5.

Fig. 7 is a horizontal section taken in the plane of the line 7-7 of Fig. 6'.

' Fig. 8 is a` rear elevation showing the clamping means; and,

Fig. 9 is a plan view detail of the slidable operating connection.

The drilling machine which I have eX- emplilied comprisesa base 21 'from which a post 22 extends upwardly, the post being stationary with the base. A rotatable sleeve or column, hereinafter called the rotatable column 23, rotates about the post, guided by bearings 24:, 25, between the post and the column. The column is shown as having a split-bearing 26 about the post, the walls- 27; 28. of the split29 in the bearing being drawn toward each other to clamp the bearing about the post, by the clamping mea-nsV hereinafterdescribed, in order to secure the column in adjusted positions about the post.

A. drill-arm 3l has a bearing 32 about the outer periphery of the column, and is adjustable to elevation on the column by suitable means, as by screw-rod 33 havingv threaded connection in a nut 34, secured to the drill-arm, and rotated in suitable man-l ner in either direction for raising or for lowering the drill-arm. When the .drillarm has been adjusted to elevation, it is clamped about thel column `by means of clamps 35. The drill-arm moves with the column when the latter is rotated for positioning the drill-arm in desirable radial positions about the post. Y

AA drill-slide 38 is adjustable in suitable or desirable manner lengthwise of the drillarm. A drill-spindle 39 is journaled in the slide in suitable manner, and is rotatable in reverse directions by means of suitablegearing .on the drill-slide, the latter gearing being rotated by means of a cross-shaft 40, journaled in bearings 4l, 42, on the drillarm. Interruption may also be effected in the drill-spindle gearing for permitting thedrill-spindle to be non-rotative in its bearings.

An upright shaft is arranged to drive the cross-shaft by means of bevel gears 46, 47. The bevel-gear 46 has its hub journaled in a suitable bearing 48 in the drill-arm in usual manner, and has spline-key and groove connection 49 with the upright shaft, so as to transmit the rotations of the upright shaft to the bevel-gear throughout the adjustment to elevation of the drill-arm. The upright shaft is exemplified as journaled in a bearing 50 at its upper end.

In the present exemplitication the upright shaft 45 is driven in suitable manner from a prime mover, represented as a pulley 53, on a shaft 54, journaled in bearings 55, in the lower end of the post. and having a bevel-gear 56, secured thereto. The bevelgear 56 meshes with a bevel-gear 57, fixed to the lower end of an axial shaft 5S, journaled in bearings 59, 60, in the post, and having` gears 61, 62, secured to its upper end.

Gears 65, 66, are journaled about a studshaft 67, fixed in a bearing 68 inthe upper plate 69 of the column. rllhe gear 61 meshes with the gear 65. A gear 71 is lixed to the upright shaft 45, and is meshed by the gear for driving the upright shaft.

An arm 73 is swingable by means of a bearing 74,'about the upper end of the upright screw-rod 33, this screw-rod having a gear 75 fixed to its upper end. Pinions 76, 77, rotate on the quadrant and are in mesh with each other. rllhe pinion 76 is in mesh with the gear 75. The pinion 77 is arranged to be brought into meshing relation selectively with the gears 62, 66, which rotate in opposite directions, for rotating the upright screw-rod 33 in opposite directions.A The shifting of the arm 73 for this purpose is accomplished by suitable means.

The clamp for clampingthe drill-arm in radial positions, instanced at the bottom of the column, comprises a bolt 61 jonrnaled in bearings S2, 83, in the walls 27, 28, of the split-bearing 26, and a nut 84 having threaded connection with said bolt. An end-thrust ball-bearing 85 is exemplilied between the bearing 82 and the nut. Pressure between vthe head of the bolt and the nut causes clamping of the column about the post for holding the radial drill-arm in radial positions. The bolt is rotatable in its bearingsv so as to control the directions in which an arm 87, shown integral with the nut, extends radially of the axis of the bolt, when the arm is in clamped relation and in unclamped relation. Then the bolt has been thus adjusted, a set-screw 88 lixes the bolt in adjusted position.

A tension bolt 91 is journaled in the walls 27, 28, and has an adjusting nut 92 and al lock-nut 93 thereon, for fixing the distance between the adjusting nut and the head of this tension-bolt, to limit the amount of separation between the walls 27, 28, when the clamp-screw is released.

I provide means for operating the clamp by an operative element in the drilling inachine, this operative element being exemplified as the upright shaft 45, which is one of the rotatable elements for rotating the drillspindle. A pair of gears 95, 96, is lixed to this upright shaft.

A box 96 hasl a bearing 99 therein, in which the lower end of the upright shaft is journaled, the box being provided with a lug 100, by means of which it is secured by bolts 101 to a boss 102 at the lower end of the column. so as to rotate with the column.

A shaft 105 is journaled in the box. Gears 106, 107, rotate in reverse directions about this shaft. The gear 106 meshes with the gear 95. rthe gear 107 meshes with a pinion 105i, rotatable on a stud 109 in the gear-box, the pinion 108 meshing with the gear 96. These trains of gearing rotate the gears 106, 107, in opposite directions.

A clutclrcollar 111 is secured to the sha It 105 by means ol a pin 112. A clutch 11,?) located between the gear 106 and the clutch-collar, and the clutch 114 is located between the gear 107 and the clutch-collar. These respective clutches are cxeniplilic-il as friction clutches comprising libre frictiondisks arranged so that end pressure thereon respectively by the clutch-collar causes driving relation through either ('luteh between the respective gears 106, 107, and the shaft 105.

Separating pins 116, the ends oll which engage washers 117, 118, between the respective ends of the pins and the gears 106, 107, maintain said gears in proper separated relation for proper operation of the clutches. The gears 106, 107, are held toward each other by the bearings 119, 120, in the ,e n'- box. The bearing 120 is exemplified as in a releasable block 121, forming part of the gearbox.

A ball-bearingl 122 surrounds the reduced end 123 oi" the shaft 105, between a washer 124 engagingra shoulder 125 on said shalt, and a collar 126 pinned to said reduced end by a pin 127. rPhe bearing 122 is located in the bearing 119. A bearing 1531 is received about the reduced end 1532 of the shaft 105, between a washer 9.3 engaging a shoulder 134 on said shaft, and a sleeve 125, secured to said reduced end by a pin 136. The bearing 131 is received in the bearing 120. y

A screw-rod 141 is rotated by the shaft 105, exeniplilied as accomplished b V a splineley and groove connection 142, between the screw-rod and the sleeve 135, for causing rotation of the screw-rod with said shaft, but permitting endwise movement of said shaft for operation of the clutches, in order` to impart rotation in reverse directions to said shaft. -l

The screw-rod is held endwise as by a collar 144, fixed thereto by a pin 145, and ball-bearings 146, 147, at the respective ends of said collar. The collar and ball-bearings are located in a cap 148, and they are held against endwise movement between a collar 1-49 clamped between the cap and the block 121, and a flange 150 of the cap. rThe cap and block are fixed to the box by means of bolts 151. i

A nut 153 is threaded about the screw-rod 141, and is arranged to be raised and lowered by rotation of the screw-rod in opposite directions. The nut 153 has connection with the arm 87,` exemplified as accomplished by providing the -arm with a fork 154, the tines of which Vare at the respective sides of the nut engaged by shoulders 155, 156, shaped so as to permit axial movement of the nut and arcuate movement of the arm.

The operating means for the clamp just described, are controlled by suitable control means, exemplified as comprising a lever 161, pivoted by means of links 162 to the gear-box, the links being articulated by pins 163 to the cover 164 of the gear-box, and by means of pins 165 to the lever. The cover of the gear-box is secured to the body of the box by means of bolts 166.

A collar` 168 is fixed to the shaft 105 by means of a pin 169. Ball-bearings 170, 171, are at the respective ends of the collar, and have ball `and socket connection 172 with the lever, part of the socket whereof is in the body of the lever, and part in a cap 173 fixed to the lever proper by screws 174.

The operation of the lever is shown effected by a cam 176, exemplified in a cain collar 177, fixed to a rock-shaft 178 by a setscrew 179. The rock-shaft is journaled in a bearing 180 in the cover 164 and a bearing 181 in the top-plate 69 of the column. This shaft shifts with the column and drill-arm. The lever 161 is provided with a pin 182, on which there is a roller 183, engaged by the cam. f l

The cam is shown as a cam-slot, the walls of which engage the roller respectively during opposite directions of rotation of the cam.. Movement of the cam in one direction causes `engagement of the clutch 113 forv place the clutches 113, 114,

tion contact inf the friction clutches within the safety requirements for said operating means for closing and opening said clamp.

Manual operating means are provided for v thecam, exemplified as a roch-shaft 185 journaled in bearings 186, 187, on the drillarm, and having a bevel-gear 188 fixed thereto, wnich meshes with a bevel-gear 189 having spline-key and groove connection 184 with the rock shaft 178. A handle-bar 191 has a handle192 thereon, extending to the front' of the machine, preferably withinV convenient reach of the operator while operating the machine, and exemplified as moving with the drill-slide.

The handle-bar has articulation 194 with an arm 195, which has a bearing 196 about the rock-shaft 185. This bearing has splinehey and groove connection 197 with raid rock-shaft, so as to rock said rock-shaft with the movements of said arm and handle-bar. The bearing` 196 is provided with an annular groove 198, into which a lip 199 of a clip 200 is received, the clip being` fixed to a bearing 261 on the spindle-slide, so as to cause the bearing 201 and the bearing- 196 to move together with the spindle-slide.

An arm 204 is pivoted on a pin 205 ina bearing 206fixed to the front of the spindleslide, this arm having articulation 207 with the handle-bar to properly position the handle of the latter with relation to the drill-arm. An end-limit ball-bearing 211 is held to the screw-rod 141 by a collar 212, secured to said screw by a pin 213, and a sleeve 214, having its ends flanged as at 215 and 216 respectively about the ball-bearing 211, and the collar 212.V

Rearward movement of the handle-bar will cause'engagement of one of the clutches and forwardV movement of `the handle-bar will cause engagement of the other of the clutches, 1

The weight of the handle-bar and its arms is preferably such that it will move the cam 176 into an intermediate position with rele-.- tion to t-he pin 182 on thelever 161, so to y l in neutral positions.`

The resistance to operation in the clutches, aidedby the steep angle of the cam 176, makes continued application of icontrol force at the handle 192 necessary to cause con` tinuation of rotation of the screw rod 141 in either direction. Villien the split-bearing 26 has been fully clamped, or the'nut 153 strikes the end-limit stop 211, slippage will take place in the respective clutches to prevent injury or damage, and the resultant extra resistance will be felt by the operator at the handle 192, who will thereupon release the handle. Upon release of the handle, the' cam 176 will move to intermediate or neutral position for vreleasing the clutches.r

llfl

In operation, if it is desired tochange the radial position of the drill-arm, and it being assumed that the clamp is in clamped position, the handle-bar is moved in one direction, for instance, rearwardly, for raising the lever 161 and the shaft 105 for engaging the clutch 113, thereby rotating the screw 141 to cause descent ot the nut 156 and unclamping ot the clamp.

Continued exertion on the handle-bar in the given direction is necessary to continue the unclamping movement of the clamparm. It the operator should continue to exert 'torce upon the handle-bar in said given direction after the nut strikes the endlimit hall-bearing 216, the resistance to turther rotation ot the screw, by having the nut reach its end-limit ot movement, will cause slippage in the friction-clutch 113, due to the tact that. owing to the great inclination of the cam 176, sui'lcient force can not be exerted by the handle-bar to prevent such slippage.

Such additional torce will also be communicated by means ot the cam to thel handle-bar to advise the operator that the unclamping limit ot movement has been reached, whereupon the operator will place the handle-bar in neutral position, or the handle-bar will, in the present instance, drop to neutral position upon its release by the operator.

The adjustment ot radial position of the drill-arm having een made, the operator will move the handle-bar in the opposite direction, in this instance, by pulling on the handle-bar, which, by reason ot the position of the handle-bar at the drill-spindle, can be done while the operator is viewing the position of the drill point with relation to the work for accurate radial position of the drill-arm. This opposite movement of the handle-bar will cause opposite movement of the nut 153 and the clamp-arm for instance to the position shown in the drawings, for clamping the clamp.

lVhen the clamping has been effected, the resistance to further movement of the nut will cause slippage in the opposite clutch 114, the resistance being communicated to the cam and to the operator through the handle-bar. The operator will thereupon return the hande-bar to neutral position, or the handle-bar will, upon its release, drop to neutral position :for again placing the clutches in neutral position.

The angle of the cam is such that the operator Cannot exert suiiicient pressure through it upon the clutch 1111- to detribination of an upright post, an upright column rotatable about said post, a radial drill-arm, power means for adjusting said drill-arm to elevation on said column, a drill spindle on said drill-arm, power means for rotating said drill-spindle, clamping means tor clamping said column with relation to said post, operating means for said clampingmeans having power connection with said last-named power means, and manual control means for said operatingmeans mounted on and movable with said drill-arm.

2. In a radial drilling machine, the combination ot an upright post, a column, a drill-arm on said column, said column rotatable about said post ior radial positions oil said drill-arm, a drill-spindle on said drill-arm, a clamp comprising a rockable member, operating means for said clamp comprising complemental threaded members including a rotatable threaded member, a shaft with which said rotatable threaded member has connection, reversely rotating gears, clutching means for clutching either ot said reversely rotating gears to said shaft, and manual control means having operative connection with said clutching means.

3. In a radial drilling machine, the combination ot an upright post, a column, a drill-arm on said column, said column rotatable about said post 'lor radial positions of said drill-arm, a drill-spindle on said drill-arm, a clamp comprising a rockable member, operating means for said clamp comprising complemental threaded members including a rotatable threaded member, a shaiit with which said rotatable threaded member has connection, reversely rotating gears, clutching means for clutching either ot said reversely rotating gears to said shaft, and means for operating said clutching means comprising a cam of less power by manual movement than said operating means having operative connection with said sha'ft for axial movement of said shaft, and a manual operating part at said drill-arm for said cam.

4. In a radial drilling machine, the combination of an upright post, a column, a drill-arm on said column, said column rotatable about said post tor radial positions of said drill-arm, a drill-spindleon said drill-arm, a clamp for clan'iping said column with relation to said post, operating means tor opening and closing said clamp comprising an operated power member of said drilling machine and opposed friction clutches, and control means for said operating means comprising a cam and a manual actuator for said cam, the angle of said cam being such as to limit the torce of friction contact in said friction clutches within the safety requirements for the said Gil operating means for closing and opening said clamp.

5. ln a radial drilling machine, the combination of an upright post, a column, a drill-arm on said column, said column rotatable about said post for radial positions of said drill-arm7 a drill-spindle on said drill-arm, a clamp for clamping said column with relation to said post, operating means for said clamp comprising an operated power member of said drillingl machine and opposed friction clutches, control means for said operating means comprising a cam, a manual actuator for said cam, and means to normally move said manual actuator into neutral position.

5. In a radial drilling machine, the combination of an upright post, a column, a drill-arm on said column, said column rotatable about said post for radial positions of said drill-arm, a drill-spindle on said drill-arm, a clamp for clamping said column with relation to said post, a screwrod for operating said clamp, a shaft, a connection between said shaft and said screw-rod for causing combined rotations of said shaft and said screwa'od and perh init-ting axial movement of said shaft with relation to said screw-rod, a pair of oppositely rotating gears about said shaft, a clutch-collar movable with said shaft, clutches between said clutch-collar and said respective gears, and control means having connection with said shaft for ope-rating said clutches.

7. In a radial drilling machine, the combination of an upright post, a column, a radial drill-arm on said column, said column rotatable about said post for radial positions of said drill-arm, a drill-spindle on said drill-arm, a clamp for clamping said column with relation to said post, a screw-rod, a nut thereabout for operating said clamp, a shaft, a connection between said shaft and said screw-rod for causing combined rotations of said shaft and said -screw-rod and permitting axial movement of said shaft with relation to said screwrod, means limiting endwise movement of said nut on said screw-rod, oppositely rotated gearings for rotating said shaft selectively in opposite directions, and means controlling the latter by axial movement of said shaft, including a cam, and an operating arm for said cam normally movable into neutral position by gravity.

8. ln a radial drilling machine, the combination of an upright post, a column, a drill-arm on said column, said column rotatable about said post for radial positions of said drill-arm, a spindle-slide on said drill-arm, a drill-spindle on said spindle slide, a clamp for clamping said colunm ith relation to said post, a screw-rod, a nut thereabout for operating said clamp, a shaft,

a vconnection between said shaft and said screw-rod for causing combined rotations of said shaft and said screw-rod and permitting` axial movement of said shaft with relation to said screwsrod, a pair of oppositely rotating gears about said shaft, a clutch-collar movable with said shaft, clutches between said clutch-collar and said respective gears, and control means having operative connection with said shaft and arranged for axial movements of said shaft for actuation of said respective clutches, said control means comprising a manual actuator on said drillarm, and connection between said actuator and said spindle-slide for causing movement of said manual actuator lengthwise of said drill-ari'n with said spindle-slide.

9. ln a radial drilling machine, the combination of an upright post, a column rotatable thereabout, a split-bearing at the base of said column about said post, a clamp for said split-bearing, a drill-arm extending laterally from said column, said column and drill-arm adjustable to radial positions about said post, means for operating said clamp comprising a gear-box at the base of said column containing reversely rotating gears, and clutch-mechanism to selectively connect said gears with said clamp, and manual means at the drill-arm for operating said clutches.

10. ln a radial drilling machine, the combination of an upright post, a column rotatable thereabout, a split-bearing at the base of said column about said post, a clamp for said split-bearing, a drill-arm extending laterally from said column, said column and drill-arm adjustable to radial positions about saidpost, means for operating said clamp comprising a gear-box at the base of said column containing reversely rotating gears and clutch-mechanism to selectively connect said gears with said clamp, a lever at the outside of said gear-box for operating said clutches, a cam on said gear-box for operating said lever, and manual control means at said arm having connection with said cam.

1l. In a radial drilling machine, the combination of a radial drill-arm, a clamp to clamp said drill-arm in radial positions, an actuating arm therefor, a nut having operative connection with said arm, a screw-rod for said nut, oppositely rotating gearings for rotating said screw-rod, means for open atively connecting said respective gearings with said screw-rod for respective opposite rotations of the latter, and control means for the latter comprising a manual actuator.

l2. in a radial drilling machine, the combination of a radial drill-arm, a clamp to clamp said drill-arm in radial positions, an arm therefor, a nut having operative connection with said arm, a screw-rod in said nut, means for positioning said screw-rod end'- Wise, n shaft, connection between said shaft and said screw-rod for Combined ro'zitions of said shaft und said screw-rod and for axial movement of said shaft with relation io said screw-rod, oppositely roi'ai'ahle gears about said shaft, :i clutch-"collar fast to said shaft between said gears, clutches between said clutch-collar and said respective gears, u

lever for axially moving` said shaft, and manual control means for the latter con 10 prising` a Cam having operative connection with said lever.

In testimony whereof, I have hereunto signed my name.

kHENRY DRESES. 

